Amazon is doing its part to help out busy parents - for just $20 a month, the e-retailer will send subscribers one item from its library of carefully-selected STEM. toys. The Seattle-based company promises each selection will be a "handpicked, high-quality Science, Technology, Engineering, and Math toy," according to its web page.

"Each month you will receive a different, age-appropriate STEM toy that will encourage your child to learn through play. From robotics to natural sciences, there’s always a new discovery on the way," Amazon said.